Hard starting, severe hesitation
10-29-2001, 01:30 AM
#1
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Location: Tucson, AZ, USA
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Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Hard starting, severe hesitation
Well, when I bought this car the owner said it had heavy issues starting and bogging.. and for the first day it was fine, but YEEK. She wasn't kidding. It hates starting, and it has random issues with throttle response (more throttle you give, worse it is, kinda as if the mixture gets worse and worse, probably leaning).. so I'm figuring it's fuel delivery at some point.. where would you guys start diagnosing on this? Gonna try to check the pump tomorrow.. need ideas in case that's not it.. Also, will a v6's pump feed a tbi motor? (may be a silly question, but possibly saving that kinda cash is worth a little ignorance rectification)
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'88 Camaro, dark forest green metallic, T-top
LO3 305 TBI/700r4
Performance mods: None yet
Audio mods: swapping system from v6 and building new fiberglass box
'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
Misc Mods: Cut air box, '83 Firebird spoiler.
Performance Parts: Accel 8mm wires, SplitFire plugs, Gabriel hijackers.
Audio Mods: Pioneer DEH-P3000, two 12" Optimus Pro Audio subs in hand-made enclosure each powered by a 260 watt Optimus amp. Working on shaving the box for weight.
My Homepage, with pics.
------------------
'88 Camaro, dark forest green metallic, T-top
LO3 305 TBI/700r4
Performance mods: None yet
Audio mods: swapping system from v6 and building new fiberglass box
'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
Misc Mods: Cut air box, '83 Firebird spoiler.
Performance Parts: Accel 8mm wires, SplitFire plugs, Gabriel hijackers.
Audio Mods: Pioneer DEH-P3000, two 12" Optimus Pro Audio subs in hand-made enclosure each powered by a 260 watt Optimus amp. Working on shaving the box for weight.
My Homepage, with pics.
10-29-2001, 03:26 AM
#2
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
First thing you want to do is make sure you wired the TPS sensor up correctly. Sometimes if you wire it up backwards (like I did) the ecm will think it's going to WOT under idle conditions and vice versa for WOT. It would run pretty good under part throttle.
If you're sure that isn't it, then I would do some plug cuts. See if the engien is running lean or rich. You might also want to borrow a scan tool to watch for knock and vacuum at the map sensor.
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, Jon (350 TBI!)
91 Red My website
If you're sure that isn't it, then I would do some plug cuts. See if the engien is running lean or rich. You might also want to borrow a scan tool to watch for knock and vacuum at the map sensor.
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, Jon (350 TBI!)
91 Red My website
10-29-2001, 09:41 AM
#3
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Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Ooohhh bloody hell. Guess this just reached critical mass. Won't start this morning =P
From the smell of things, it's fuel deprivation. Hardly any gas smell.. even at the tail pipe.. and it only began to fire up once for a brief second, so I doubt it's just getting burned off. Gonna try to find a pressure gauge and get her tested out. Wish me luck =)
------------------
'88 Camaro, dark forest green metallic, T-top
LO3 305 TBI/700r4
Performance mods: None yet
Audio mods: swapping system from v6 and building new fiberglass box
'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
Misc Mods: Cut air box, '83 Firebird spoiler.
Performance Parts: Accel 8mm wires, SplitFire plugs, Gabriel hijackers.
Audio Mods: Pioneer DEH-P3000, two 12" Optimus Pro Audio subs in hand-made enclosure each powered by a 260 watt Optimus amp. Working on shaving the box for weight.
My Homepage, with pics.
From the smell of things, it's fuel deprivation. Hardly any gas smell.. even at the tail pipe.. and it only began to fire up once for a brief second, so I doubt it's just getting burned off. Gonna try to find a pressure gauge and get her tested out. Wish me luck =)
------------------
'88 Camaro, dark forest green metallic, T-top
LO3 305 TBI/700r4
Performance mods: None yet
Audio mods: swapping system from v6 and building new fiberglass box
'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
Misc Mods: Cut air box, '83 Firebird spoiler.
Performance Parts: Accel 8mm wires, SplitFire plugs, Gabriel hijackers.
Audio Mods: Pioneer DEH-P3000, two 12" Optimus Pro Audio subs in hand-made enclosure each powered by a 260 watt Optimus amp. Working on shaving the box for weight.
My Homepage, with pics.
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